Keystones — Capstone
Five GCSE retrieval questions · 27 May 2016 · mathsvault.uk/keystones
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1. Number Simplifying surds
Simplify: √704
Answer: 8√11 -
2. Algebra Completing the square
Complete the square: 2x² - 4x
Answer: 2(x - 1)² - 2 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 30cm, b = 17cm, angle = 52°. Give your answer to 2 decimal places
Answer: 200.94cm² -
4. Ratio Combining two ratios
a:b is 8:9 and b:c is 7:6. Find a:b:c in its simplest form.
Answer: 56:63:54 -
5. Statistics Averages and range
Find the mean, median and range of: 54, 22, 85, 77, 18, 23, 71
Answer: Mean = 50, Median = 54, Range = 67